Hello, you can apply for AAO with no scores below 90 but you need to put complex evidence forward. You will need three or more scores between 90-94 relating to three different areas of speed of working and lots of other evidence. All is explained in the “Bible” (Access Arrangements and Reasonable Adjustments, JCQ) and it is all on page 24 and 25. If you need more help, email JCQ. They are always very helpful and answer emails pretty quickly.
Hope you will be successful!