In 1st attempt it would be 70–75 in moderate paper . In 2nd attempt it would increase 5–10 marks with same type of paper . Best of luck for your exam .

Hey aspirant,

Analyzing the previous year database of marks vs percentile, you need to score 65-75 marks out of 300 for getting a percentile of 85 in JEE mains. Further, to get more precise  information on marks vs percentile vs Rank, you must go through the following link.

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

above 70 marks                                                                                                                             All the best                                                                                                                               keep preparing