Positive and Negative Skewness

CFA Level I
#1

why when the skewness is a negative number is it called: Distribution Skewed to the Left

Can someone explain me the picture?

https://gyazo.com/a53ce448384e5aeaa98dffe6a4dd8936

In a distribution with a negative skewness it has more positive values than negatives, althrough higher negatives numbers compensate that turning the skewness negative.

But why is the picture like that?

#2

“Negative”, “positive”, “to the left”, and “to the right” describe the direction of the longer tail.