Hi co11insmom,
Star notes as they're called are replacement notes. The wrappers from original bundles direct from the Bureau of Engraving and Printing explains them briefly: "If the numbers on notes in this package do not run in sequence, the substituted notes are indicated by a 'star'." Essentially, if they had to pull one or more notes because they were in some way defective, they would replace them with specially-prepared star notes.
Your note, which judging by the serial number is very likely from Series 1969A, would be worth approximately USD $8 if it is in perfect condition. If it is in circulated condition, its value would drop to just above face value.
I hope that helps,
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BWJM, F.O.N.A.
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