Query regarding mock tests

Ive been giving mocktests for clerk exams for the past few weeks in different apps like testbook, guidely, oliveboard and smart keeda.

Ive noticed that the questions are a bit difficult in ob,tb, sk compared to guidely and ive been scoring less (65-70) in ob,tb and sk but the percentile is above 85%. Should i focus on scoring more or should i be content with the percentile??