Hello student yes you'll get admission as per previous year cutoffs in nit Srinagar with this percentile.
You can calculate and get your rank easily by using this formula
100 - (your total percentile) 869010 /100
In your case your rank must be around 86901
And Last year the cut off for Genral category was 86828 (computer science engineering)
Please help me with your category so that I can provide you more exact information.
Cut off vary every year on various factors like the level of question in the entrance examination and total number of applicants in that examination.

Refer to the link mentioned below for more information
https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-nit-srinagar/amp

Application form for jee main April examination starts from 07th of February and shall remain open till 07th of March 2020.

Feel free to comment if you have any doubt
Good luck

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