Since your ABC 5.1 is on real channel 5, and the Winegard 7698 only receives VHF-high (channels 7-13) and UHF, but not VHF-low on channels 2-6, the 7698 will not receive your ABC 5.1/5. In order to receive that channel, you'd need either:
(1) a Winegard HD8200U (which covers VHF-low, VHF-high and UHF, all in one antenna):http://www.solidsignal.com/pview.asp?mc=03&p=HD8200U
(2) a Winegard HD7084 (which also covers VHF-low, VHF-high and UHF, all in one antenna):http://www.solidsignal.com/pview.asp?mc=03&p=HD7084
(3) a Winegard HD5030 (which covers VHF-low and VHF-high), plus a separate UHF antenna (91XG or DB8 or 4228HD or HD8800), joined together by a UVSJ near the antennas into one downlead to the tv:http://www.solidsignal.com/pview.asp?mc=03&p=HD-5030http://www.solidsignal.com/pview.asp?mc=03&p=91XGhttp://www.solidsignal.com/pview.asp?mc=03&p=DB8http://www.solidsignal.com/pview.asp?mc=03&p=4228-HDhttp://www.solidsignal.com/pview.asp?mc=03&p=HD-8800http://www.solidsignal.com/pview.asp?mc=03&p=UVSJ
You'll definitely lose some signal strength inside the attic with typical plywood/asphalt shingle construction (maybe a third, more loss on VHF than UHF in my experience). FYI, I cannot get VHF 11.1 or 13.1 from my attic (plywood/asphalt shingles) at 65 miles and 6.3/5.9 dB NM respectively with a Winegard YA1713 (VHF-high-only antenna) without an amp, but it comes in fine out on the chimney (also without an amp). So, in my fairly flat suburban terrain without too many close high trees, I estimate maximum reliable attic reception range at around 50 miles or so with the best antennas and no amp (sorry, I don’t have any amp experience to share). At night, my attic antennas will start to receive UHF stations at 55-60 miles, but not the VHFs. If your attic has foil or any other metal, forget it.
Assuming plywood/asphalt shingles, if you have sufficient attic space, you could temporarily try one of these options at the very highest point in your attic (perhaps first without an amplifier, and then with), to see if reception is sufficient. Due to the antenna configurations, the HD5030 plus UHF (especially the DB8 or 4228HD or HD8800) is probably the most attic-friendly, and capable of being mounted a little higher (which was very important for my attic installation). I doubt the signals are strong enough at your location for reliable reception from your attic without an amplifier, and maybe not even with an amp.
Mounted outside in a fixed position at 305-306 degrees (probably okay without an amp), any of these combinations should get all of your stations from that direction (maybe even including 39.1 ION at 320 degrees if you cheated a little and pointed it (or just the UHF if using separates) around 310-ish degrees. Would FOX 17.1/16 at 306 degrees be an acceptable substitute for FOX 15.1/15 in the opposite direction? If so, no need for a rotor.
If you put any of these combinations outside on a rotor (not necessarily with an amp), you'd probably get everything in all directions down to 0.0 db NM on your TVFool report reliably, and maybe even the first few in the negative dB NM range, but perhaps not as reliably.
Hope this is helpful...