I would say,retake the toefl ,UMN people are very highly selective,i ve been schedueled for an interview there but didnt attend ,its a great school but limited seats(10 only)
what do u think? dont risk ur chances ,u have plenty of time still to retake,so go ahead
BTW i took the toefl 3 times and i scored 100+ finally,believe it or not Toefl score makes a difference, i know its hard but come on u did the harder already👍