The European Parliament election of 1984 took place on 17 June 1984.
The Italian Communist Party was narrowly ahead of Christian Democracy in Sardinia. The Sardinian Action Party had a surprisingly good result and was able to elect Mario Melis to the European Parliament in the Islands constituency, thanks to an alliance with several regionalist parties notably including the Valdostan Union, the Trentino Tyrolean People's Party and Liga Veneta.
Results
Source: Ministry of the Interior
References
European Parliament election, 1984 (Sardinia) Wikipedia(Text) CC BY-SA