Hello Ayush,

The percentile of 85 in JEE Mains will land you around 168k rank in open category and this might not what get you into DTU however you might look into following colleges for admission in Computer Science and Engineering:

• Narula Institute Of Technology
• Institute Of Science And Technology
• Dr. Sudhir Chandra Sur Degree Engineering College
• Siliguri Institute Of Technology
• Dayanand Anglo Vedic Institute of Engineering and Technology
• International Institute of Information Technology (IIT), Pune.
• Vidyalankar Institute of Technology,Wadala, Mumbai
• St. Francis Institute of Technology,Borivali, Mumbai
• Anjuman-I-Islam's M.H. Saboo Siddik College of Engineering, Byculla, Mumbai
• WATUMULL INSTITUTE OF ELECTRONICS ENGINEERING & COMPUTERTECHNOLOGY, ULHASNAGAR

As per the previous trends upro 2018 you might be able to get Computer Science and Engineering in the aforementioned colleges with 85 percentile in JEE Mains you can also look for more colleges and branches using the following link:

https://engineering.careers360.com/jee-main-college-predictor

All the best