Hey Aryan,
With this percentage (85%) you can get admission in most of the colleges of the state (West Bengal) for this course(BSc Microbiology), you can check out this list of colleges mentioned below who are offering this course,

• St. Xavier's College, Kolkata
• Scottish Church College
• Maulana Azad College, Kolkata
• The Neotia University, Kolkata
• Lady Brabourne College, Kolkata
• Ramakrishna Mission Vidyamandira, Howrah
• Ashutosh College, Kolkata
• Barrackpore Rastraguru Surendranath College, North 24 parganas
• Dinabandhu Andrews College, Baishnabnagar
• Techno India University, Kolkata
• Acharya Prafulla Chandra College, Kolkata
• West Bengal State University, Barasat
• Ananda Chandra College, Jalpaiguri
• Banwarilal Bhalotia College, Asansol
• Gyan Jyoti College, Siliguri
• Jagannath Kishore College, Purulia
• Dhruba Chand Halder College, North 24 Praganas
• Kalyani Mahavidyalaya, Nadia
• Michael Madhu Sudan Memorial College, Durgapur
• Panskura Banamali College, Midnapore

ALL THE BEST!