CREATE TABLE table_name_63 (population_density INTEGER, population__2011_ VARCHAR(255), change___percentage_ VARCHAR(255), county VARCHAR(255))
What is the Population density that has a Change (%) higher than 10.4, and a Population (2011) less than 8574, in the County of Queens?
    
SQL: SELECT AVG(population_density) FROM table_name_63 WHERE change___percentage_ > 10.4 AND county = "queens" AND population__2011_ < 8574