The last note on the 1st string is E at the 12th fret, so in order to continue down the scale, I skip over to the 3rd string and tap D at the 19th fret, followed by pull-offs to C and A.

Play the single-note line with a similar staccato sound. For the muted ‘x’ notes relax your fretting finger so that the string is not touching the frets. ... Start with your first finger at the 12th ...