This is the anthem forum page. This is the link to the sims 4 forum page: https://answers.ea.com/t5/The-Sims-4/ct-p/the-sims-4-en
This forum should help you solve your issue. Search for your issue or scroll through to find an issue similar to yours.
Hope this helped
Hold right mouse button down and drag or use . and ,
To rotate an item you are holding in build mode hold ALT down while doing the above.
@samanthachrapko your post was moved I see, just want to let you know it moved over here.
Other to what jpkarlsen suggested, you can also turn on the Sims 3 mouse in the option (esc -> options). Maybe you can work a bit better with that.