The #6 through #12 seeds are set...unless I'm mistaken.
If Illinois loses...
Iowa is #6.
The common records among the 8-10 teams:
Illinois is 2-2
Purdue is 2-1
Minnesota is 1-2
So that's your seeding right there. Iowa #6, Illinois #7, Purdue #8 and Minnesota #9.
If Illinois wins...
Iowa gets #6 due to winning their one game against Iowa
Illinois gets #7 due to losing their one game against Illinois
Purdue gets #8 due to winning their one game against Minnesota
Minnesota gets #9 due to losing their one game against Purdue.
If Nebraska wins, they are #10.
If Nebraska loses, they are #10 (won their one game against Northwestern).
So, here is your 6-12 final seeding:
6. Iowa
7. Illinois
8. Purdue
9. Minnesota
10. Nebraska
11. Northwestern
12. Penn State