Is it possible to convert XLRI BM call with 97.985 percentile in XAT for a fresher?

Yes, it is definitely possible. My brother had a 97.6 percentile in XAT 2018. He converted both XL BM and HRM calls that year as a fresher. XAT percent is just one of the major aspects looked into for selection.

Besides XAT there are Other important aspects. Let’s look into them - 

1. Consistent academic profile: Scores in the 10th and 12th boards are also important because they reveal the student's capability.
2. Diverse co-curricular and extracurricular profile: Include your interests, hobbies, extra-curricular, etc. as it will increase your chances of getting admission.
3. Positions of Responsibility: Use your undergrad years to shoulder techno-managerial responsibilities. This will allow you to grow and evolve from a variety of experiences. It will help you build an overall profile and thrive at a B-school. While serving as Vice President of IEEE and Head of Department and College Fests, my brother was a member of his college's editorial board.
4. Research Projects and Internships: During your undergrad, pursue technical projects and internships to build a diverse profile. Apart from interning with ONGC, Teleysia Networks Pvt. Ltd., and Bharti Airtel, my brother also served as a managerial intern at IIM Ahmedabad.

Giving your best to a meaningful and learning-oriented work experience will also help you secure and justify a shortlist and subsequent selection with one top B-school.