What is hawaiian island whose population was 84 in the 2020 census?

I am sorry, as an AI language model, I don't have access to live data. However, I can provide you with some general information about Hawaii.

Hawaii is a state located in the United States and is made up of a group of islands in the Pacific Ocean. It is known for its beautiful beaches, scenic landscapes, and rich cultural heritage.

The state of Hawaii has a total population of approximately 1.4 million people as per the 2020 Census. The largest city and the capital of the state is Honolulu, located on the island of Oahu.

The island of Hawaii also known as the "Big Island" is the largest of the Hawaiian Islands with a population of around 200,000. It is known for its active volcanoes and lush green rainforests.

The population of an island with only 84 people is not common and it can be assumed that it may be one of the smaller uninhabited islands.