320 GRE is indeed a good score considering work experience of 5.4 years. But it's just not a numbers game but your over profile matters. It is high time where you start working on your application essays since most B schools have R1 deadlines in September/October.
Showcase the achievements that you have achieved during the tenure of your career, showcase your leadership qualities which is one of the most important qualities that most of the top looks into the applicant. You have to represent yourself in a very unique way through your essays.
Considering your GPA, GRE, and work experience, you stand a chance to apply for below mentioned are some of the b-schools you can consider applying in.
New York University Stern School of Business
University of Chicago Booth School of Business
Columbia Business School
Yale SOM
Georgetown McDonough School of Business.
Dartmouth Tuck School of Business
Harvard Business School
Stanford Graduate School of Business
Please feel free to reach out for any further queries.