Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_56 (population_density__per_km²_ VARCHAR, population__2006_ VARCHAR)
### Question:
What population density (per km) that has 84 as the population (2006)?
### Answer:
SELECT population_density__per_km²_ FROM table_name_56 WHERE population__2006_ = "84"