You asked
How tall can my fence be?
Fences cannot be taller than six (6) feet, measured from finished grade. They must also stay in the rear yard and not extend forward of the rear corners of the house. Gates must match the fence height. You need the ARC's written approval before building, so submit an application to the management company first.
Approval needed first · Architectural Review Committee (ARC) Exterior Change Application
“Fences shall not exceed six (6) feet in height measured from finished grade.”
Architectural Guidelines and Design Standards, Section 4.2, page 1“Gates shall match the fence in style, height and material.”
Architectural Guidelines and Design Standards, Section 4.4, page 1“All fences require prior written approval of the ARC.”
Architectural Guidelines and Design Standards, Section 4.1, page 1“Applications shall be submitted to the management company on the ARC Exterior Change Application form.”
Architectural Guidelines and Design Standards, Section 2.1, page 1
Information, not legal advice. This is what your documents say, with citations.