When I bought my D7000 new late last year I could not get autofocus tuned properly. The body was backfocusing so far that even -20 fine tune settings were not enough. I took the body and the Nikkor 18-200 mm lens to a Nikon repair facility where they adjusted the body. I then managed to fine tune autofocus well enough to ensure good focus with both lenses.
You may have to take the body and Nikkor lenses for adjustment. If it's only the lens that needs adjustment, at least they can calibrate it with the body.
Welcome to Nikonians Karen! Are your other lenses focusing correctly? And if so, are your shots of static subjects, tripod mounted of hand held faster than 1/500 out of focus also? What shooting conditions and modes are you using? And if possible, can you post an image that shows this problem, that also has its exif meta data intact? If you are coming from a lower resolution camera you will probably notice you need a higher shutter speed to eliminate motion blur since smaller movements of the camera are recorded with the ultra-fine pitched pixels. Stan St Petersburg Russia