A 680 credit score is the lower threshold of good credit on the FICO scale. This used to be the desirable score to have to refinance a home mortgage or buy a home. According to Bankrate.com, this threshold was raised to 720 in April 2012 and 740 in August 2013.
While 680 is still the threshold for good credit on the FICO scale, it is not good enough to qualify for better interest rates on mortgages. In 2012, the United States' largest lenders suffered tremendous losses, which resulted in tightened lending practices. There may be more adjustments in the future.