Can he do that???

So, I live in Utah and I was wondering if anyone can tell me if this allowed? Yesterday my manager told my husband who also works at the same place I do, that instead of coming in at 5 today, he wanted me in at 6. I was supposed to do a 5-1:15 shift. Well, he swapped me and my coworker. So now he wants me here till 3. He didn’t ok it with me, he just did it. Is he allowed to do that without asking or really even notifying me?