If the 10th digit of your VIN is an "E," you have an '84. This can be a little confusing to those who don't understand the industry. Keep in mind that although the Mustang came out in 1964, there are no 1964 Mustangs; they are all 1965's. Another example is the Chevy Citation, which was billed as "the first car of the 1980's." They were first sold in April of 1979.