Welcome to the Forum!
Actually, your numbers sound (read) much better than many people's that are just starting out. Yes, a healthy diet will make that much difference, along with the gym time. Read the first three threads in the Type 2 Section and do a tag search for "Normal Blood Sugar". This information should get you started with your education, remember that education is the key to beating those T2 numbers down. Loosing just twenty (20 lbs) pounds will make a huge difference in your numbers, as well. Good luck with your control, management and the diet.