Yeah, I agree with
AjiteshArun. If you’re taking the test at a Pearson center, they usually provide noise-canceling headphones, which can really help with focus. You can check if those are available at your previous test center, or consider switching to a different one if that’s an option.
From a practice standpoint, if you’re already in the high 90 percentiles, I think you just need to stay in touch by practicing a few questions occasionally so you don’t lose your rhythm. Other than that, honestly, you don’t need any special or extra preparation.