The exact cutoff percentile for qualifying JEE Mains is not yet announced by National Testing Agency (NTA). Since JEE Mains is going to be conducted twice in this year in various shifts on various days the cutoff marks to be eligible to give JEE Advance cannot be predicted. 

I suggest you to wait for the officials to announce the precise cutoff percentile.

If you still have any queries feel free to ask in the comment section down below. 

Hello

The qualification marks and cut off would be given after another session of jee exam which is to be held in the month of april once that results are out the could off for advance would be released so please wait or if you wanna score more marks try to attend another session exam and score well.

Thank you