We can't get the #5 seed.
Notre Dame has it locked down. There is no way to nudge them off that spot.
Edit: okay, one way to push ND down a notch. Just one way. But it doesn't benefit the Vols. Oregon and Penn State play a very close game, maybe even overtime close, but Penn State wins. In that instance, it is possible--not for sure, but possible--that Penn State could rise to #2 after the SEC champ, and Oregon could tuck in right behind Penn State at #3.
Then the ranking could be:
#1 - SEC Champ
#2 - B10 Champ (Penn St)
#3 - B10 runner-up (Oregon)
#4 - Notre Dame
#5 - Tennessee or the SEC runner-up
#6 - SEC runner up or Tennessee
And the seeding would be:
#1 SEC Champ
#2 B10 Champ
#3 some other champ
#4 some other champ
#5 Oregon
#6 Notre Dame
#7 and #8, Vols and the SEC runner-up in whatever order.