First, param is wrong. I have redesigned all renderer. If you want to check full documentation I will post link below.
Second, as you want to use it on your website, are you using it with ASP.Net or Silverlight. As GraphicsRenderer is for Winform's Graphics class, which is under namespace System.Drawing.
For silverlight, I haven't put it into main stream, but it is available under one of issue thread.
Download - SilverlightQR Geometry Control and Image control.7z.
Newest implementation will not simply ask you to input module size. It has two option, FixedCodeSize or FixedModuleSize.
CodeSize = QrCode's pixel width.
ModuleSize = QrCode each small module's width.
So now format is like this.
GraphicsRenderer renderer = new GraphicsRenderer(
new FixedCodeSize(200, QuietZoneModules.Two))
If you have further question just leave behind.
For Silverlight I will sort it out and put it in before next release. The one I post there should work mostly fine.