Automatic sorting names based on numerical data

Hi,

I am trying to create an assessment spreadsheet. Next to a name, a mark is given in a number format. Depending on what mark is given, it will then place the name under the corresponding mark heading in alphabetical order. I'd like this to happen in the same sheet and also in another sheet. I have the currently used the following formula =IF(G6=8.5,A6,0). This has done what I would like but there are 0's in between the names. I'd like no zero's and no spaces between names. I have attached my document, 'Test' is what I tried to do and 'What i would like' is how I'd like it to appear. I know how to use formulas but I think this may require more technical advice. Any advice would be greatly appreciated. Thank you