HELLO SOUVIK
sinc ethe official cutoofs from the college are yet to be anounced so let me give you a insight of previous year cutoofs
Indian Institute of Engineering Science and Technology Shibpur Course Wise Cutoffs Trends
B.Tech Aerospace Engineering

2018    32202 Max. Closing rank

2017    28894 Max. Closing rank

B.Tech Civil Engineering

2018    32576 Max. Closing rank

2017    31503 Max. Closing rank

B.Tech Computer Science and Technology

Also Known As: Computer Science and Engineering (4 Years, Bachelor of Technology)

2018    10056 Max. Closing rank

2017    12829 Max. Closing rank

B.Tech Electrical Engineering

2018    17529 Max. Closing rank

2017    18632 Max. Closing rank

B.Tech Electronics and Telecommunication Engineering

2018    12813 Max. Closing rank

2017    14161 Max. Closing rank

B.Tech Information Technology

2018    21859 Max. Closing rank

2017    25050 Max. Closing rank

B.Tech Mechanical Engineering

2018    21896 Max. Closing rank

2017    21373 Max. Closing rank

B.Tech Metallurgy and Materials Engineering

2018    37217 Max. Closing rank

2017    34842 Max. Closing rank

B.Tech Mining Engineering

2018    40008 Max. Closing rank

2017    36731 Max. Closing rank

as per the january session is concerned the percentile above 98+ would do the job.
HOPE IT HELPS BEST OF LUCK!!