Hi happygoluck,
To start, if your 4 Official Scores are all in the high-600s or low-700s, then you probably do NOT need to retake the GMAT again. At least one of those Scores would almost certainly help to solidify your overall application profile, so you could comfortably apply to any of the Schools that you're interested in.
Depending on the Schools that you plan to apply to, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/Did you purchase the Enhanced Score Report for any of your Official GMATs. While the ESR doesn’t provide a lot of information, there are usually a few data points that we can use to define what you should work on to score higher. If you purchase the ESR, then I'll be happy to analyze it for you.
In addition, hen are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich