Hii aspirant ,

Coming to your question I would first like to congratulate him on getting a very good percentile in the jee mains and based on this percentile his marks will be around in between of 310-360 marks and rank will be under 200 that is the all India rank ,

For more information you can go to the link stated below,

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

Hope this helps you ,

Good luck.