It depends on the level of resistance expressed by the MRSA strain type. Some isolates show a high level of resistance for which 5mcg have no effect what so ever and no zone of inhibition is seen.
You may use MIC strip for methicillin to test the MIC of Staphylococcus aureus. After using MIC strip you could tell the mic of your strain by observing the strip. it is a most easy procedure. You have to mention the zone of inhibition.
Whether or not you will see a zone of inhibition depends on how resistant the isolate is. In our database we have MIC values of methicillin against S. aureus: https://www.researchant.org/compound/817.html
If you are looking for more information other antimicrobials that have been tested against MRSA, you can search for MRSA in the organism search: https://www.researchant.org/search.html?searchScope=searchOrganism&searchString=MRSA