Hi there, 

Thanks for contacting careers 360

The percentile won't be changed anymore.

Providing your our websites link for more information 

Hello Jaya, The percentile will not be changed after the final answer key release. For more information you can check here : 

https://news.careers360.com/nta-release-jee-main-2019-final-answer-key-soon-result-be-announced-january-31