Minecraft – teleport entity to the block the player is targeting usnig command blocks

Any selector arguments you use in testfor can be used in tp. Like so:

1.7 to 1.12: /tp @a[score_HEALTH=1] X Y Z
1.13+:       /tp @a[scores={HEALTH=..1}] X Y Z

There are problems with using low health to check for death. Instead, I'd recommend adding a deaths scoreboard:

/scoreboard objectives add deaths deathCount

This score will get set to 1 when a player dies (automatic, because of the type of objective), your commands can teleport players with a deaths score of 1 and then set it back to 0 (so the player isn't repeatedly teleported).

The following commands are a full solution, including the team score incrementing, for 1.13+:

tp @a[scores={deaths=1..}] 73 10 31
execute as @a[scores={deaths=1..},team=red] run scoreboard players add blue points 1
execute as @a[scores={deaths=1..},team=blue] run scoreboard players add red points 1
scoreboard players set @a deaths 0

You can spawn a redstone block a certain numbers above or below the point of the player with an activator rail ontop. Then spawn a command minecart on the activator rail with the command /spreadplayers ~ ~ 1 false @e[name=PlayerHome,type=ArmorStand,c=1,r=2].

Because the /spreadplayers will load the chunk the entity is spread to, the commandblock minecart on the activator rail will permenantly keep the chunk that the armorstand is in loaded. When moving the point, run a fill command and a kill command at the previous home to remove the traces. When you are teleporting the player back to their home, you can simply offset the teleportation by a few blocks in the y coordinate.