Hi aspirant...!

Hope you're doing great...!

So, with regard of you're query. For the percentile of 68 there are tough chances to get CSE branch even though you got 85% percent in you're board. because, there no weightage for  Board marks in JEE mains. you can predict you're college from the link that I am providing you below:

https://engineering.careers360.com/jee-main-college-predictor?utm_source=clevertap&utm_medium=clevertap-sticky&utm_campaign=jee-main-qna-web-wap

Hope this will helps you....!

GOOD LUCK...!