Sagar Kumar according to last year JEE Advance cut-off with 85 marks you won't even able to clear the OBC category cut-off as it was 115 last year. Although last year 18 marks were given to all due to fault in the paper and also according to experts the difficulty level of this year paper was a little more in comparison to last year so the cut-off is expected to go down around 95-100.

If the prediction is true and the cut-off goes down still it will be very difficult for you to clear JEE Advance cut-off and even if you are able to clear the cut-off then you will be eligible to sit in IIT counselling but still, your rank will be very low as around 5000 in the OBC category and you will not be able to get admission in any of the IITs.

Feel free to ask if you have any more queries. All the best!!