Many programs are very competitive. There's no guarantee that you will get into the exact program at the exact university that you want. Obviously, the higher your GPA the better your chances of getting in. Very competitive programs may look for GPAs at 3.5 or higher. Less competitive programs may accept 3.0 or a bit lower.
Many graduate schools weigh letters very highly.
Strong letters of recommendation can compensate for GPAs and GREs that are a bit weak. At NC State, especially in our Psychology Department, you have the unique opportunity to get to know the faculty. Get involved in the Psychology Club and other activities in the department. Talk to the faculty. The better they know you, the more likely they can write a convincing letter.