I didn't ask you what the store manager said. I asked why YOU think they have chosen YOU to cut back.
I understand what the store manager said. I understand that you are usually one of the two top sales people every week.
What YOU don't seem to understand is that cutting your hours and no one else's is not inherently illegal. It is only illegal in some circumstances. If you can't give me an idea what YOU think their reason is, I can't even begin to guess if you have any legal recourse.
Now, one more time. Fill in the blank: "I think that the REAL reason they decided to cut my hours is ______________________"