Echoing the above, you can't spot reduce the fat on your back by doing back exercises. If you do some moderate-to-high intensity cardio a few times a week, plus do upper body weight training to increase overall fat metabolism and add some muscle (which always looks good IMO), you should be there in no time. Cut out any processed food you're eating, eat plenty of veggies, and get in your daily fiber and protein.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).