What can I say to make him shut up and stop being a fruitcake?

There is this guy that sits behind me in my history cl and he is kind of weird. He whispers very loud and violently to himself and he will sit way up in his seat and breathe very heavily and small amounts of saliva will get on my neck. He whispers to himself so fast you can't understand it it is like another language and he does it so loudly. He also likes to make space ship noises sometimes but not to be funny or anything like he does it as a habit. They are like whizzing sounds all fast together like this heavy breathing. When he does it it is extremely hard for me to concentrate on my work and it even gives me a headache sometimes. It is so creepy to have him sitting behind me and I try to scoot my chair up a little bit but he never gets the hint. He has been like this since he moved to our school and I have seen a lot of people bothered by it in homework center before. He will also make these loud abnoxious statements about things like "That's disgusting" or "That's pathetic" and he will yell things out like he knows everything and he is so cool. When the teacher says work on your work sometimes he will get out of his seat and wander around and look through the teacher's cabinents and personal stuff but she rarely even notices him. I can't ask my teacher to move me from him she is very mean and strict and will tell me to grow up. What body language signals or things can I turn around and say to him that will make him realize he is being annoying?