Turtle and Observer Command
setycor-at xcor ycor number

Sets the y-coordinate of the turtle xcor units in the x direction and ycor units in the y direction away from the caller to number.

Examples:

setycor-at 1 1 5 sets the y-coordinate of the turtle one unit to the right and one unit above the caller to 5.

Related commands:
ycor-at xcor ycor setx sety setxy xcor-at ycor-at