Hello Khushi, 

Delhi University's Undergraduate Courses take admissions in Science Stream on the basis of merit list and JEE Scores do not apply to Delhi University.

If you have got 84% and do not have any reserved seats, you can get into colleges like Bhagini Nivedita, Shaheed Rajguru College of Applied Sciences for Women, Acharya Narendroa Dev, Kalindi College, etc. 

Since you have not mentioned the specific course you wish to take, I have given you a broad idea of the colleges where you may get admissions with yoour scores; however, I would suggest you to refer to last year's DU cut off to have a better idea and apply for other private colleges.

All the best!