Final answer:
According to King Bumi, there are 84 types of jings in Avatar: The Last Airbender, with three primary types - positive, negative, and neutral jing.
Step-by-step explanation:
According to King Bumi in the show Avatar: The Last Airbender, there are 84 types of jings. Jings are a concept in the show that represent different styles of martial arts. There are three primary types of jings - positive, negative, and neutral jing. Each of these primary types has multiple subtypes, resulting in a total of 84 different jings that a skilled fighter can employ.