Unfortunately he is not breaking any law in New Jersey based on what you describe. He is free to point his cameras any angle or view he would have is he was standing right there where the camera is. He has a right to be there, and a right to look. Same as if he stood there and was just watching all day. No laws about such. You can set 100 cameras up on your lawn or porch or on your house or in your house pointed at every neighbor on your block. Its all legal in NJ.
Now depending who your police department is, you might be able to get a sympathetic officer will to talk to him about it, which may make him change his behavior, but there is no legal requirement they go or he change his cameras after.
The closest law on the books is Criminal Trespass, N.J.S.A. 2C:18-3, that states: "A person commits a crime of the fourth degree if, knowing that he is not licensed or privileged to do so, he peers into a window or other opening of a dwelling or other structure adapted for overnight accommodation for the purpose of invading the privacy of another person and under circumstances in which a reasonable person in the dwelling or other structure would not expect to be observed." Now before he can be charged, the police will need to prove beyond a reasonable doubt the neighbor was knowing recording into a window- not just a overview of your exterior or a portion of your exterior, but his screen was zoomed in and focused into a window. Now unless he volunteers to show such to the police, there is no law that allows them to look at his screen or what he recorded at this point. Additionally, if the cameras don't have zoom lenses, there is no reason to believe he is looking in your actual windows.
Sorry! NJ only has laws prohibiting the use of hidden cameras only in certain circumstances, such as in locker rooms or restrooms, or for the purpose of viewing a person in a state of partial or full nudity.