Very nice poll for Clinton given how white the sample is at 66%. The exit poll in 2008 had whites at 65% and even in 2014 it was at 64%. I'd expect something like 62% this year.
It was 61.39% in 2012. With the state's continued population growth and Trump pushing non-white voters to the polls, it should be lower. Clinton's team should be conducting voter registration drives, especially in the Atlanta suburbs, and getting them to the polls. If the white vote in Georgia falls below 60%, it won't be a good night for the GOP.