How much is theaahniikh ahmokpatia 1984 worth?

You are referring to a coin from Greece (the letters that you wrote as "theaahniikh ahmokpatia" are actually "ΕΛΛΗΝΙΚΗ ΔΗΜΟΚΡΑΤΙΑ" in the Greek alphabet - they would be pronounced as "(H)ellenike Demokratia" and translate as "(the) Greek Democracy"). You would need to describe the coin more fully (denomination and condition) to be able to get an accurate value.