Thinking about the areas of a standard normal distribution, as z values decrease, do the areas to the left of z increase, or decrease?

The Standard Normal Distribution is a "Bell-shaped" curve as shown in the figure below.
The distribution ha these properties:
(i) The normalized random variable, z, is the horizontal coordinate for the curve.
(ii) The total area under the curve is 1.
(ii) The curve is symmetric about z = 0.

As z values decrease, areas to the left of z decrease.