Hello aspirant,
Yes you are eligible for it because they need aggregate marks as you have got 85% .
You have to satisfy at least one of the following two criteria for admission to IITs:
The candidate should have passed 10+2 or equivalent examination with an aggregate of at least 75% marks. For SC/ ST and PwD candidates, there is a relaxation of 10% as they need the aggregate of minimum 65% marks.

Hope it helps.

Hello aspirant

As per your question, According to new rules as guided by the MHRD and cbse the minimum percentage for General and obc candidate is 75% and the person belonging to any category is 65% for sc st and physically handicapped.

Yes u are eligible.

Hope this information is relevant to your question.

Thank you:)