I dreamt of a man in a white suit waking me from sleep. Never said a word. He went outside in my garage and began throwing things out. I saw 2 signs, one looked like a bullseye. I woke up. Who is the man

Dreams are totally made up of a mix of memories, and apply only to YOU. There is no universal dream dictionary, despite what many say.
When have you seen men in white suits? I can think of some TV commercials.
Cleaning out often just means cleaning out! Either literally (your living situation) or your thoughts and emotions.

Sounds to me like you had better get your house in order. Are your closets full Of white suits !